While you can upgrade from 370V to 440V

providing a direct fit that aligns with existing mounting points for a streamlined installation

This specific control knob is built to interface seamlessly with the D-shaped or splined shafts commonly found on QMark electric heaters and Berko wall heaters

it ensures proper atmospheric isolation

Nordyne 626470R Limit Switch While you can upgrade fromThe Nordyne 626470R Limit Switch is a critical safety component designed for precise thermal regulation within Nordyne, Intertherm, and Miller gas furnaces. This 115 155F AUTO limit switch functions as a high limit safety control, monitoring the heat exchanger temperature to prevent overheating and potential equipment failure. As an L155 40F furnace limit switch, it is engineered to open the circuit at a fixed 155F set point and automatically reset